How to Test a Transponder Car Key
- 1). Enter your car, insert your transponder key into the ignition and turn the key to the "On" position.
- 2). Wait for the security light to turn on and leave your key idle in the ignition for 10 minutes until the security light turns off.
- 3). Turn your key to the "Off" position within one minute of the security light turning off.
- 4). Repeat Steps 1, 2 and 3 another two times, ending with the key in the "Off" position after the third cycle. This will take about 30 minutes.
- 5). Remove the key from the ignition and then insert it again and turn it "On" to test the programming.
Source...